<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>脚本定义</title>
</head>
<body>
    <div>
        <!-- alert('1111') -->
    </div>
    <script>
        alert('内嵌脚本')
    </script>
    <script src="wailian.js">
        alert('外部引入')
    </script>
    <div>避免延迟</div>
</body>
</html>